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diff --git a/interferometry.tex b/interferometry.tex index ef14794..02c1b3d 100644 --- a/interferometry.tex +++ b/interferometry.tex @@ -56,7 +56,7 @@ In \textbf{Fabry-Perot configuration} the input light field bounces between two A Fabry-Perot interferometer consists of two parallel glass plates, flat to better than 1/4 of an optical wavelength $\lambda$, and coated on the inner surfaces with a partially transmitting metallic layer. Such two-mirror arrangement is normally called an {\it optical cavity}. The light in a cavity by definition bounces -back and forth many time before escaping; the idea of such a cavity is crucial for the construction of a laser. +back and forth many times before escaping; the idea of such a cavity is crucial for the construction of a laser. Any light transmitted through such cavity is a product of interference between beams transmitted at each bounce as diagrammed in Figure~\ref{fpfig1}. When the incident ray arrives at interface point $A$, a fraction $t$ is transmitted and the remaining fraction $r$ is reflected, such that $t + r = 1$ ( this assumes no light is lost |